## Warning: package 'sp' was built under R version 3.4.3
## Warning: package 'rgdal' was built under R version 3.4.3
## rgdal: version: 1.2-16, (SVN revision 701)
## Geospatial Data Abstraction Library extensions to R successfully loaded
## Loaded GDAL runtime: GDAL 2.1.3, released 2017/20/01
## Path to GDAL shared files: /Library/Frameworks/R.framework/Versions/3.4/Resources/library/rgdal/gdal
## GDAL binary built with GEOS: FALSE
## Loaded PROJ.4 runtime: Rel. 4.9.3, 15 August 2016, [PJ_VERSION: 493]
## Path to PROJ.4 shared files: /Library/Frameworks/R.framework/Versions/3.4/Resources/library/rgdal/proj
## Linking to sp version: 1.2-5
## Warning: package 'rgeos' was built under R version 3.4.2
## rgeos version: 0.3-26, (SVN revision 560)
## GEOS runtime version: 3.6.1-CAPI-1.10.1 r0
## Linking to sp version: 1.2-5
## Polygon checking: TRUE
## Warning: package 'tmap' was built under R version 3.4.3